Customising error bars

[Damien_Segransan]

Hi,
Does anyone know how to customize a chart with error bars?

I am currently making charts based on XYErrorRendererDemo1.java.
My data have small error bars and their range (in Y) is large so the default parameters of XYErrorRendererDemo1 are not satisfactory .

I have 3 questions :

1> Is it possible to change the size, shape and color of the dot for a given time serie?

2> Is it possible to remove the tiny horizonal segment at the top of the y-error bar ? and to do the same with the x-error bar?

3> Is it possible to change the width of the error bars?

Thanks,

Damien

[pkubanek]

Hi,

I provided XY patch. I'm as well unhappy with small horizontal and vertical lines, but I cannot find better solution.

> 1> Is it possible to change the size, shape and color of the dot for a given time serie?

You mean central dot? It should be possible, it's setSeriesShape(i, shape) method of XYErrorBarRender. I can add method for color as well if you would like to have one..

> 2> Is it possible to remove the tiny horizonal segment at the top of the y-error bar ? and > to do the same with the x-error bar?

No. Should I add an option for that? I did not like it either.

> 3> Is it possible to change the width of the error bars?

What do you mean by width? Line width? Edge line width?

Petr Kubanek
ISDC, Versoix

[Damien_Segransan]

Thanks Petr for your explantions. My figure looks great now !!

To summarise my email exchange with Petr, here is how I did proceed
to customise my graph and error bars.


XYErrorRenderer renderer = new XYErrorRenderer();

renderer.setCapLength(0.02); //that reduces the size of the top and side segment

renderer.setSeriesShape(0, new Ellipse2D.Double(-1.5, -1.5, 3.0, 3.0));//The markers are small filled disks

renderer.setSeriesPaint(0, Color.blue);//The markers and their error bars are blue


Different marker type can be chosen with :
renderer.setSeriesShape(0, new Ellipse2D.Double(-3.0, -3.0, 6.0, 6.0));
renderer.setSeriesShape(0, new Rectangle2D.Double(-3.0, -3.0, 6.0, 6.0));
renderer.setSeriesShape(0, ShapeUtilities.createDiamond(4.0f));

[Garfke]

Thanks Petr for your explantions. My figure looks great now !!

To summarise my email exchange with Petr, here is how I did proceed
to customise my graph and error bars.


XYErrorRenderer renderer = new XYErrorRenderer();

renderer.setCapLength(0.02); //that reduces the size of the top and side segment

renderer.setSeriesShape(0, new Ellipse2D.Double(-1.5, -1.5, 3.0, 3.0));//The markers are small filled disks

renderer.setSeriesPaint(0, Color.blue);//The markers and their error bars are blue


Different marker type can be chosen with :
renderer.setSeriesShape(0, new Ellipse2D.Double(-3.0, -3.0, 6.0, 6.0));
renderer.setSeriesShape(0, new Rectangle2D.Double(-3.0, -3.0, 6.0, 6.0));
renderer.setSeriesShape(0, ShapeUtilities.createDiamond(4.0f));

Is it possible to change the width of the error bar stroke on a series basis?

Calling

Code: Select all

errorRenderer.setErrorStroke(new BasicStroke(1f));

gives me the strange exception :

Code: Select all

java.lang.NoSuchMethodError: org.jfree.chart.renderer.xy.XYErrorRenderer.setErrorStroke(Ljava/awt/Stroke;)V

Is this the way to change the width of the errorbar?

[david.gilbert]

Calling

Code: Select all

errorRenderer.setErrorStroke(new BasicStroke(1f));

gives me the strange exception :

Code: Select all

java.lang.NoSuchMethodError: org.jfree.chart.renderer.xy.XYErrorRenderer.setErrorStroke(Ljava/awt/Stroke;)V

Is this the way to change the width of the errorbar?

That would be a strange exception if you are using JFreeChart 1.0.13, but not if you are using some earlier version which doesn't have that method defined.

[Garfke]

Calling

Code: Select all

errorRenderer.setErrorStroke(new BasicStroke(1f));

gives me the strange exception :

Code: Select all

java.lang.NoSuchMethodError: org.jfree.chart.renderer.xy.XYErrorRenderer.setErrorStroke(Ljava/awt/Stroke;)V

Is this the way to change the width of the errorbar?

That would be a strange exception if you are using JFreeChart 1.0.13, but not if you are using some earlier version which doesn't have that method defined.

I use version 1.0.13 : otherwise I should get a compile-error?

[Garfke]

Calling

Code: Select all

errorRenderer.setErrorStroke(new BasicStroke(1f));

gives me the strange exception :

Code: Select all

java.lang.NoSuchMethodError: org.jfree.chart.renderer.xy.XYErrorRenderer.setErrorStroke(Ljava/awt/Stroke;)V

Is this the way to change the width of the errorbar?

That would be a strange exception if you are using JFreeChart 1.0.13, but not if you are using some earlier version which doesn't have that method defined.

I use version 1.0.13 : otherwise I should get a compile-error?

[david.gilbert]

Maybe you compile with 1.0.13 then run with another version. You wouldn't be the first.

[Garfke]

Maybe you compile with 1.0.13 then run with another version. You wouldn't be the first.

you're probably right...

I never downloaded another version because i never used JFreeChart before... but... for my new project I use some classes from another project in eclipse. I checked that other project out of SVN and I now found that that other project contains certain classes that make charts and an older version was in the lib of that project in SVN...

Stupid eclipse : it should give precedence to libs in the main project...

Anyway, thanks for the hint!